Genitourinary Imaging    Delayed 18F FDG PET/CT Imaging in the Assessment of Residual Tumors after Transurethral Resection of Bladder Cancer   Increased mean standardized uptake value and greater lesion thickness at fluorine 18 fluorodeoxyglucose PET/CT help differentiate residual tumors from inflammation after transurethral resection of bladder cancer.       Hui Yan, Xiang Zhou...Jianjun Liu

Neuroradiology   White Matter by Diffusion MRI Following Methylphenidate Treatment: A Randomized Control Trial in Males with Attention-Deficit/Hyperactivity Disorder   This randomized clinical trial on the influence of methylphenidate on brain development using diffusion-tensor MRI found fractional anisotropy to increase in specific brain areas of boys with attention-deficit/hyperactivity disorder but not in young adult men or in boys receiving a placebo.       Cheima Bouziane, Olena G. Filatova...Liesbeth Reneman

Special Report   U.S. PET/CT and Gamma Camera Diagnostic Reference Levels and Achievable Administered Activities for Noncardiac Nuclear Medicine Studies   On the basis of American College of Radiology survey data from 2015 to 2017, diagnostic reference level and achievable administered activity benchmarks are presented for gamma camera and PET/CT examinations. These data may be used to optimize radiotracer dose in nuclear medicine facilities and potentially reduce radiation dose.       Murray D. Becker, Priscilla F. Butler...M. Elizabeth Oates

Reviews and Commentary

Review   Error Disclosure and Apology in Radiology: The Case for Further Dialogue   Radiology's leaders in peer review, patient-centered care, quality and safety, legal affairs, and institutional processes can help prepare radiologists to communicate openly with patients and families about errors by spearheading dialog within the profession regarding how best to implement this emerging practice standard.     Stephen D. Brown, Michael A. Bruno...Thomas H. Gallagher

Images in Radiology   Vincristine-induced Polyneuropathy at FDG PET/CT   Kwok Sing Ng, Joyce May Sum Leung